Machine for grinding and sizing paper-pulp



J. JORDAN Jr. 8v T. EUSTIGB.

vGRINDING AND SIZING PAPER PULP.

Patented May 18, 1858.

l Illlllllflll UNITED STATES PATENT OFFICE.

THOS. EUSTIGE, OF HARTFORD, AND JOSEPH JORDAN, JR., OF EAST HARTFORD,

- CONNECTICUT.

MACHINE FOR GRINDING AND SIZING PAPER-PULP.

Specification forming part of Letters Patent No. 20,277, dated May 18, 1858; Reissued December 4, 1860, No. 1,088.

To all whom it may concern:

Be it known that we, THOMAS EUsTrcE, of the city of Hartford, and JOSEPH JORDAN, Jr., of the town of East Hartford, county of Hartford, and State of Connecticut, have invented a new and useful Improvement in the Mode of Constructing Machines for Grinding and Breaking Rag-Pulp for Paper-Making; and we do hereby declare that the following is a correct description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon.

The nature of our invention consists in a conical inner and outer cylinder the inner one revolving on its axis and the surface of both being fitted with angular shaped grooves to form the grinding knives.

To enable others skilled in the art to make and use our invention we will proceed to describe its construction and operation.

The drawing.-Figure 1 is a side view and part section of the machine. Fig. 2 is a transverse section of the same.

Letter A, outer cylinder or case; B, inner ditto and shaft; C, bearings; D, set screws; E, collar and ditto; F, driving pulley; G, feeding pipe entrance; H, discharging ditto; I, size, ditto; L, frame.

The outer cylinder A is fixed permanently on a strong frame L with proper bearings and attachments.

The inner cylinder B is placed inside of the outer one, and revolves on its axis, having the shaft B passing through and working on the bearings C, and the whole is adjusted by the set screws and collars D and E, proper stuffing boxes M are placed at each end of the cylinder, to prevent the escape of water or pulp, on all the outer surface of the inner cylinder, and all the inner surface of the outer ditto we form angular shaped grooves or channels running obliquely and crossing each other, the edges answering the purpose of knives to cut and grind the pulp. The fineness and coarseness of the grinding is adjusted by the inner cylinder being moved laterally by means of the set screws D, D.

The feed entrance pipe G is for the pulp to pass into the cylinder, and the pipe H is to discharge the same when ground.

The pipe I is for the size to pass in to mix with the pulp while being ground and before being discharged at the orifice H.

The pulp being passed in through the pipe G at the small end is by the natural shape of the cones while revolving carried to the exit pipe or discharging orifice H.

In the construction of this machine we have considered several important matters in the operation of reducing the pulp of the rags to a proper fineness and quality for the production of good paper, the economy of consumption of stock, the facility of feeding the pulp into the machine, also the method supplying the size, and the smallness of the power to work the machine when compared with the old method. Furthermore the peculiar arrangement of the pulp and size induction pipes, G, I, and the common eduction pipe, H, with reference to the conical grinding surfaces having their common axis arranged horizontally, and the rotary grinder made adjustable with respect to the stationary grinder in the manner as explained, renders our machine of great value and importance. By this arrangement, the sizing is not introduced into the pulp until it is nearly if not entirely reduced to the fineness required, and by being introduced into the upper part of the outer case it becomes thoroughly mixed with the pulp before the latter is discharged through the pipe, H.

The reduction of the rags takes place at, first, near the smaller end of the inner grinder, and they are finally discharged under the said grinder and near to its larger end, the arrangement of the grinders so that their common axis may be horizontal, cans; ing gravitation to operate in effecting the passage of the pulp from the induction pipe to the eduction pipe.

7e are aware, that a conical grinder arranged within and so as to rotate in an in closing conical case or grinder is not new for grinding or reducing bark, corn, rags or other matters, and therefore we lay no claim to such.

We are also aware of the cob and corn grinder exhibited and claimed in Number 12,356 of United States Patents, the same differing materially from our invention, for

the first is provided with two sets of grinders applied to one shaft, one of such grind-' ers being furnished with two induction pipes, while the common eduction pipe is at the end of the lower grinder. Such an arrangement of grinders will not admit of the adjustment of the inner to the outer grinder by the longitudinal movement of the former within the latter; nor will it suflice for grinding pulp and mixing size with itas the introduction of the size and rags at or near one end of the grinder and causing such to work through the entire machine from one end to the other is not so advantageous, as introducing the rags and the size at or near the opposite ends respectively of a single conical grinder having its eduction pipe at or near its larger end as in our machine.

What we claim therefore is Our improved machine for the manu- V facture and sizing of pulp, that is as constructed of a single conical grinder and outer shell, and with pipes for the introduction of the rags and the size and the eduction of both arranged with reference to the axis and ends of the grinder substantially in manner and so as to enable the grinder to operate to reduce the rags to pulp and mix the sizing therewith as hereinbefore ex- HENRY C. ROBINSON.

[FIRST PRINTED 1911.] 

